The National Railway Museum have recently launched a railway photos section on their website, which of course includes some photos of interest in relation to LMS carriages.
This first five photos (NRM ref containing DY) illustrate various stages of the construction and assembly of railway carriages at Derby Carriage Works in Midland Railway days, prior to the formation of the LMS. The remaining photos (NRM ref containing W or WOL) show various stages of the construction and assembly of railway carriages at the ex-LNWR Wolverton Carriage Works in LMS days.
Carriage building at Derby works, 1921. NRM Ref: 1997-7397_DY_11795 © National Railway Museum and SSPL
Carriage building at Derby works, 1921. NRM Ref: 1997-7397_DY_11793 © National Railway Museum and SSPL
Carriage building at Derby works, 1921. NRM Ref: 1997-7397_DY_11791 © National Railway Museum and SSPL
NRM Ref: 1997-7397_DY_12841 © National Railway Museum and SSPL
Derby carriage and wagon works, 1910 NRM Ref: 1997-7397_DY_9315 © National Railway Museum and SSPL
Sewing room at Wolverton railway works, 1930 NRM Ref: 1996-7312_W_81 © National Railway Museum and SSPL
Wolverton railway works, 1930. NRM Ref: 1996-7312_W_84 © National Railway Museum and SSPL
Railway carriage components under construction, about 1928. NRM Ref: 1996-7312_WOL_2018 © National Railway Museum and SSPL
Wagon shop, about 1928. NRM Ref: 1996-7312_WOL_2023 © National Railway Museum and SSPL
Railway carriages being constructed at Wolverton works, 1930 NRM Ref: 1996-7312_W_83 © National Railway Museum and SSPL
Wolverton railway works carriage shop, about 1928. NRM Ref: 1996-7312_WOL_2026 © National Railway Museum and SSPL
Railway carriages under construction, about 1928. NRM Ref: 1996-7312_WOL_2017 © National Railway Museum and SSPL
Railway carriages under construction, about 1928. NRM Ref: 1996-7312_WOL_2015 © National Railway Museum and SSPL
Workers building a railway carriage, about 1928. NRM Ref: 1996-7312_WOL_2013 © National Railway Museum and SSPL
Workers constructing a railway carriage, about 1928. NRM Ref: 1996-7312_WOL_2012 © National Railway Museum and SSPL
I hope this serves as a useful introduction to this valuable resource, and await with anticipation for the NRM to publish further photos from their archives.